You can buy a license directly from the Gibson Research Corporation (GRC) website .
If you already own SpinRite 6.0, you are entitled to a free upgrade to version 6.1. spinrite 6.1 download
SpinRite 6.1 is the first major update to the industry-standard data recovery and maintenance utility in 20 years. Released as a high-performance "catch-up" version, it brings massive speed improvements and modern hardware support to the legendary tool. You can buy a license directly from the
SpinRite is an "operating system independent" tool, meaning it runs outside of Windows, Linux, or macOS. GRC | Hard drive data recovery software meaning it runs outside of Windows